Decarbonizing-torch.



M. K. DUNHAM & H. H. ARMSTRONG. DEGARBONIZING TORCH. AERLIGATION FILEDFEB. 21, 1913.

Patented Apr. 22, 1913.

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IIIII" un'inmvwrl Wiiinegs We i as r in nn'riisouannfx. Domain, orIIBROOKLINE, AND {HARRY n. ARMSTRONG, or iin'wron, MASSACHUSETTS,AssIenoas TO THE 020 COMPANY, or BOSTON, MASSACHUSETTS,

A CORPORATION OF MASSACHUSETTS.

DECABIBONIZING-TORCH.

Specification of Letters Patent.

Patented Apr, 22, 1913.

Application filed February 21, 1913. Serial No. 749,768.

larly adapted for decarbonizationof cylina ders of internal combustionengines, but

which may be adapted for use in other re lat-ions.

In order that the principle of the inven- 'tion may be readilyunderstood, we have disclosed a' single embodiment thereof in' theaccompanying drawings, wherein-- Figure 1 is a side elevation of thedecar bonizing torch embodying our invention, the gas engine cylinderinto which the nozzle is inserted being represented in longitudi--nalsection; Fig. 2 is a vertical sectional view-of the gas retardingchamber; Fig. 3

is'a View, partially in longitudinalsection, of the handle barrel, thevalve and operat ing parts, and the discharge nozzle; and

Figs. 4, 5 and 6 represent, in longitudinah section and in end-view,three forms of interchangeable nozzles adapted for use with;

the torch of our invention.

the cylinders of internal combustion envided for this purpose.

One object of ur invention is provide a readily transportabledecarbonization torch which will effectively and quickly remove thecarbon deposits from the interior;

wallsof automobile gas engine cylinders or like parts. 7

Referring more particularly to the drawings, we have in Fig. 1represented astorage tank at 1 adapted to contain a suitable fluid forthe purpose, and preferably pure or substantially pure oxygen. Theoxygen may be manufactured ,m any sultable manner, ,as, for example, by'liquefying air and extracting the nitrogen. V We have ascertamed that.if the gas contained more than three or four'per cent. of nitrogen,i tis ineffective for decarbonization. Accordingly,

which is a reducing or regulating valve 5 having a pressure gage 6. p

As the oxygen is discharged past the valve 5, its pressure is reduced topreferably five or ten pounds. The result of this reduction in pressureis the very rapid lowering of the oxygen to a temperature at which itcannot mosteffectively be employed for decarbonization purposes. Toovercome this disadvantage, we have provided a chamber 7 represented inFigs. 1 and 2, which'at one end is in communication by a passage 8 withthe reducing valve-5, and at its other end by a, passage Q'andhandcontrolled valve 10 with a preferably flexible pipe, hose or conduit-11. The chamber? constitutes a gas retarding chamber wherein thetemperature of the gas may be elevated upon retardation, as, forexample, from the external air. The oxygen being admitted to the chamber7 is thereby sufficiently delayed in its passage into and through thepipe 11 to permit and Great difficulty has heretofore been ex 5perienoed in removing carbon deposits from cause the temperature of theoxygen to be elevated to such a point that the oxygen may be effectivelyused for decarbonization and like purposes. The gas, herein the oxygen,upon bein admitted through the passage 8 into the c amber 7 reverberatesor 1 rebounds from the walls thereof, which causes sufficient eddying ofthe gas to pregent its direct passage throughthe chamer. l

While We have found in practice that the chamber 7 will in itselfsufficiently delay the passage of the gas to permit its tempera ture tobe raiseu, we may, if desired, employ some suitable substance to beplaced int-he chamber, and which will cooperate to this end. Forexample, We mayempl'oy calcium chlorid, lime or potassium chlorid, the

1 0 Eli former acting also as a drier. The valve 10 may be somanipulated,- if desired, as to pieelevated in the chamber 7 The chambersaid pipe 11 is provided with a handle barrelis independent of thestorage tank in that it constitutes a chamber distinct therefrom and isin communication therewith by means of the manually manipulable valve 5which can be independently regulated.

The pipe 11 is of any suitablematerial, such, for example, as hose ofany desired diameter and length. The forward end of 12, through whichextends a longitudinal gas-conveying passage 13 positioned eccentricallyto the longitudinal axis thereof, said passage 13 being preferably ofsubstantially the same diameter, as the hose or pipe 11. The forward endof the barrelhandle is provided with a discharge coupling or passage 14,which is represented as positioned quite close to the periphery of thebarrel handle, so as effectively to permit the control of the adjacentvalve, as hereinafter set forth. Suitably connected to andcommunicatinwith the passage or coupli'ngM is a va ve casing 15 having a transversegas passage 16 therethrough and also a suitable valve 17 provided with atransverse orifice 18. The said valve is provided with a spindle 19,about which is positioned a coil spring 20 serving normally to lift thevalve into closed position, as indicated in Fig. 3. The valve may beinserted through the lower end of the-casing 15, it being held in placetherein by a suitable plug21'. The

' valve 17 is automatically and normally held closed by the spring 20,and for the purpose of opening the same, we have provided a suitablehandle 22 pivoted at 23 on the valve casing and extending longitudinallyalong and in sufiicient proximity to the barrel handle 12 to permit thehand of the user tograsp at the same time both the barrel-handle and thevalve operating handle 22. In this manner, the discharge nozzle may bereadily held and directed and the oxygen admitted and discharged intothe engine cylinder as desired. I I

vIn Fig. 1, we have represented at 24 a portionof the cylinder. of a gasengine having suitable valves 25, 26. In the illustrated and typical useof the invention, we have indicated the removal of the spark plug andthe insertion through the resulting orifice 27 of the nozzle 28, bywhich the oxygen is directed against the carbon deposits, 30 aseffectively to cut out andremove the same.

The nozzle 28, which is detachably connected to the valve casing 15 by asuitable readily detachable coupling 29, is a flexible form-retainingnozzle, which therefore may be readily bent into such form or shape thatit may be easily inserted through the orifice 27 and the oxygen directcdagainst the walls of the cylinder. For the best results, the nozzle isformed of soft metal, such, for example, as seamless copper, which maybe bent into the desired form and which will retain its shape until itis desired to change the same.

The nozzle 28 "is provided with a removable tip 30. We contemplate theemployment of a series of interchangeable tips, which may be differentlyformed, so as to control and regulate the character of the gasdischarged. For this purpose, in Fig. 4, we have represented a tip 31having a small orifice 32 which is most serviceable when it is desiredto discharge the gas along a comparatively narrow path. In Fig. 5, wehave represented a tip 33 having a flaring or spreader dischargingorifice 34, the function of whichis to spread the discharging gas overan extended and preferably rounded surface. In Fig. 6, we haverepresented a tip 35 having a flattened discharge orifice 36, which maybe effectively used to discharge the gas a flat surface.

We have demonstrated in use that the apparatus operates most effectivelyto remove the decarbonization deposits when working upon a hot cylinder,thus demonstrating that the oxygen acts more efiiciently when at anelevated temperature.

in a sheet across So far as we are aware, we are the first to recognizethe advantage of so constructing a decarboniza-tion torch that the gasis' discharged therefrom at a substantially elevated temperature.

From the foregoing description, it 1' will be evident that the torchembodying our in-. .vention'is of slmple and inexpensive constructionand that it is adapted for ready use'in connection with cylinders ofinternal combustion engines or other parts having carbon, or likedeposits.

Having thus described one illustrative embodiment of our invention, wedesire it to be understood that the scope of the -invention is evidencedby the following claims.

Weclaimv 1. A decarbonizing torch for internal combustion engines andthe like, comprising in combination a as storage tank, an-independentgas retar ing chamber in communi-' cation therewith and wherein thetemperature of the gas may if desired be elevated, an independent,manually manipulable reducing valve between and controlling the passageof gas from said tank'to said chamber, and a-discharge pi'pe leadingfrom said 1 chamber and having a nozzle adapted for insertion through anopening and into a cylinder-of an internal combustion engine or likepart.

2. A decarbonizing torch for internal combustion engines and the like,comprising or like part.

in combination a gas storage tank, having a reducingivalve and adischarge pipe, said pipe havin a handle portion and a gas controllingvalve located in proximity thereto, said gas-controlling valve beingpositioned in such relation to said handle portion that the pipe maysimultaneously be supported and the said valve opened by one hand of theoperator, said discharge pipe having a discharge nozzle formed ofreadily bendable and shape-retaining material adapted for insertionthrough an opening and into the cylinder of an internal combustionengine 3. A decarbonizing torch comprising in combination, a tank havinga reducing valve and pipe leading therefrom, a barrel handle mountedupon said pipe and having a discharge nozzle formed of readily bendable.and shape-retaining material adapted for insertion through an openingand into the cylinder of an internal combustion engine, a valve andvalve casing between said barrel and nozzle, and a valve handlecontrolling the opening of said valve and extending longitudinally alongsaid barrel handle in position to permit said barrel handle and valvehandle to be simultaneously grasped.

4. A decarbonizing torch comprising in combination, a storage tankhaving a reducing valve and discharge pipe, a barrel handle mounted onsaid pipe and having a longitudinal gas passage eccentrically of itsaxis, a valve casing in communication with and adjacent to said barrelhandle passage, a valve positioned therein and having a spring normallyclosing the same, and a valve opening handle pivoted upon the valvecasing and extending along and in proximity to the handle barrel for thepurpose stated.-

5. A decarbonizing torch comprising in combination, an oxygen'storagetank having a reducing valve and flexible pipe leading therefrom, abarrel handle carried by said pipe, a valve casing adjacent thereto andhaving a spring closed Valve, an opening-

